<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" placeholder="姓名" id="i1">
<input type="text" placeholder="工资" id="i2">
<input type="text" placeholder="工作" id="i3">
<input type="button" value="添加" onclick="f()">
<table border="1">
  <caption>员工列表</caption>
<tr>
  <th>姓名</th><th>工资</th><th>工作</th>
</tr>
</table>
<script>
let i1=document.querySelector("#i1")
let i2=document.querySelector("#i2")
let i3=document.querySelector("#i3")
function f() {
  let tr=document.createElement("tr")
  let nameTd=document.createElement("td")
  let  salTd=document.createElement("td")
  let jobTd=document.createElement("td")
  nameTd.innerText=i1.value;
  salTd.innerText=i2.value;
  jobTd.innerText=i3.value;

  tr.append(nameTd,salTd,jobTd);

  let table=document.querySelector("table");
  table.append(tr)

}

</script>
</body>
</html>